public async Task ImportForeignFilterBankOwners(WRLDCWarehouseDbContext _context, ILogger _log, string oracleConnStr, EntityWriteOption opt)
{
FilterBankOwnerExtract fbOwnerExtract = new FilterBankOwnerExtract();
List <FilterBankOwnerForeign> fbOwnersForeign = fbOwnerExtract.ExtractFilterBankOwnersForeign(oracleConnStr);
LoadFilterBankOwner loadFbOwner = new LoadFilterBankOwner();
foreach (FilterBankOwnerForeign fbOwnerForeign in fbOwnersForeign)
{
FilterBankOwner insertedFbOwner = await loadFbOwner.LoadSingleAsync(_context, _log, fbOwnerForeign, opt);
}
}
public async Task <FilterBankOwner> LoadSingleAsync(WRLDCWarehouseDbContext _context, ILogger _log, FilterBankOwnerForeign fbOwnerForeign, EntityWriteOption opt)
{
// check if entity already exists
FilterBankOwner existingFbOwner = await _context.FilterBankOwners.SingleOrDefaultAsync(fbO => fbO.WebUatId == fbOwnerForeign.WebUatId);
// check if we should not modify existing entities
if (opt == EntityWriteOption.DontReplace && existingFbOwner != null)
{
return(existingFbOwner);
}
// find the FilterBank via the FilterBank WebUatId
int fbWebUatId = fbOwnerForeign.FilterBankWebUatId;
FilterBank filterBank = await _context.FilterBanks.SingleOrDefaultAsync(ss => ss.WebUatId == fbWebUatId);
// if FilterBank doesnot exist, skip the import. Ideally, there should not be such case
if (filterBank == null)
{
_log.LogCritical($"Unable to find FilterBank with webUatId {fbWebUatId} while inserting FilterBankOwner with webUatId {fbOwnerForeign.WebUatId}");
return(null);
}
// find the Owner of the substation via the Owner WebUatId
int ownerWebUatId = fbOwnerForeign.OwnerWebUatId;
Owner owner = await _context.Owners.SingleOrDefaultAsync(o => o.WebUatId == ownerWebUatId);
// if owner doesnot exist, skip the import. Ideally, there should not be such case
if (owner == null)
{
_log.LogCritical($"Unable to find FilterBank with webUatId {ownerWebUatId} while inserting FilterBankOwner with webUatId {fbOwnerForeign.WebUatId}");
return(null);
}
try
{
// check if we have to replace the entity completely
if (opt == EntityWriteOption.Replace && existingFbOwner != null)
{
_context.FilterBankOwners.Remove(existingFbOwner);
}
// if entity is not present, then insert or check if we have to replace the entity completely
if (existingFbOwner == null || (opt == EntityWriteOption.Replace && existingFbOwner != null))
{
FilterBankOwner newFbOwner = new FilterBankOwner();
newFbOwner.OwnerId = owner.OwnerId;
newFbOwner.FilterBankId = filterBank.FilterBankId;
newFbOwner.WebUatId = fbOwnerForeign.WebUatId;
_context.FilterBankOwners.Add(newFbOwner);
await _context.SaveChangesAsync();
return(newFbOwner);
}
// check if we have to modify the entity
if (opt == EntityWriteOption.Modify && existingFbOwner != null)
{
existingFbOwner.OwnerId = owner.OwnerId;
existingFbOwner.FilterBankId = filterBank.FilterBankId;
await _context.SaveChangesAsync();
return(existingFbOwner);
}
}
catch (DbUpdateException e)
{
_log.LogCritical($"Error occured while inserting FilterBankOwner with webUatId {fbOwnerForeign.WebUatId}, owner id {owner.OwnerId} and ssId {filterBank.SubstationId}");
_log.LogCritical($"EntityWriteOption = {opt.ToString()}");
_log.LogCritical($"{e.Message}");
return(null);
}
return(null);
}
